<template>
 <div class="list" ref="wrapper">
   <div>
   <div class="area">
     <div class="title ">当前城市</div>
     <div class="button-list">
       <div class="button-wrapper">
         <div class="button">{{this.city}}</div>
       </div>
     </div>
   </div>
   <div class="area">
     <div class="title ">热门城市</div>
     <div class="button-list">
       <div class="button-wrapper" v-for="item of hot" :key="item.id" @click="handleCityClick(item.name)" >
         <div class="button">{{item.name}}</div>
       </div>
   </div>
   </div>
   <div class="area" v-for="(item, key) of cities" :key="key" :ref="key">
     <div class="title ">{{key}}</div>
     <div class="item-list">
       <div class="item border-bottom"
            v-for="innerItem of item"
            :key="innerItem.id"
            @click="handleCityClick(innerItem.name)"
       >
         {{innerItem.name}}
       </div>
     </div>
   </div>
   </div>
 </div>
</template>

<script>
import Bscroll from 'better-scroll'
import {mapState, mapMutations} from 'vuex'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState(['city'])
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  }
}
</script>

<style lang="stylus" scoped>
   .list
     position absolute
     top 1.65rem
     left 0
     right 0
     bottom 0
     overflow hidden
   .title
      line-height .44rem
      padding-left .2rem
      color #666
      margin .15rem .3rem
      font-size .26rem
    .button-list
      overflow hidden
      padding .1rem .6rem .1rem .1rem
      background white
      .button-wrapper
        float left
        width 33.33%
        .button
          margin .1rem
          padding .1rem 0
          text-align center
          border .02rem solid #ccc
          border-radius 0.06rem
    .item-list
      background white
      .item
        line-height .76rem
        padding-left .2rem
      .border-bottom
        &:before
          border-color #CCC
</style>
